LYGIA Shader Library

ellipsoidSDF (lygia/v1.1.6/sdf/ellipsoidSDF)

generate the SDF of an approximated ellipsoid

Use:

<float> ellipsoidSDF( in <vec3> p, in <vec3> r )

Check it on Github


#ifndef FNC_ELLIPSOIDSDF
#define FNC_ELLIPSOIDSDF

float ellipsoidSDF( in vec3 p, in vec3 r ) {
    float k0 = length(p/r);
    float k1 = length(p/(r*r));
    return k0*(k0-1.0)/k1;
}

#endif

Use:

<float> ellipsoidSDF( in <float3> p, in <float3> r )

Check it on Github


#ifndef FNC_ELLIPSOIDSDF
#define FNC_ELLIPSOIDSDF

float ellipsoidSDF( in float3 p, in float3 r ) {
    float k0 = length(p/r);
    float k1 = length(p/(r*r));
    return k0*(k0-1.0)/k1;
}

#endif

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